MC33364D2G Ver la hoja de datos (PDF) - ON Semiconductor

Número de pieza

componentes Descripción

Fabricante

MC33364D2G

Critical Conduction GreenLine SMPS Controller

ON Semiconductor 

MC33364

PIN DESCRIPTION

Pin

Function

Description

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1 (1)

Zero Current Detect

The ZCD Pin ensures critical conduction mode. ZCD monitors the voltage on the auxiliary winding,

during the demagnetization phase of the transformer, comparing it to an internal reference. The

ZCD sets the latch for the output driver.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 3 (2)

Current Sense

The Current Sense Pin monitors the current in the power switch by measuring the voltage across

a resistor. Leading Edge Blanking is utilized to prevent false triggering. The voltage is compared to

a resistor divider connected to the Voltage Feedback Pin. A 110 mV voltage off−set is applied to

compensate the natural optocoupler saturation voltage.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 4 (3)

Voltage Feedback

The Voltage Feedback Pin is typically connected to the collector of the optocoupler for feedback

from the isolated secondary output. The Feedback is connected to the Vref Pin via a 5 k resistor

providing bias for the external optocoupler.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 6 (4)

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 8 (NA)

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 9 (5)

Vref

Frequency Clamp

A GND

The Vref Pin is a buffered internal 5.0 V reference with Undervoltage Lockout.

The Frequency Clamp Pin ensures a minimum off−time value, typically 6.9 ms. It prevents the

MOSFET from restarting within a fixed (33364D1) or adjustable (33364D) delay. The minimum

off−time is disabled in the 33364D2. Therefore the maximum switching frequency cannot exceed

1/(TON + TOFFmin).

This pin is the ground for the internal circuitry excluding the gate drive stage.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 10 (5)

P GND

This pin is the ground for the gate drive stage.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 11 (6)

Gate Drive

The gate drive is the output to drive the gate of the power MOSFET.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 12 (7)

VCC

Provides the voltage for all internal circuitry including the gate drive stage and Vref. This pin has

Undervoltage Lockout with hysteresis.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 16 (8)

Line

The Line Pin provides the initial power to the VCC pins. Internally the line pin is a high voltage

current source, eliminating the need for an external startup network.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ NOTE: For further information please refer to the following Application Notes;

AN1594: Critical Conduction Mode, Flyback Switching Power Supply Using the MC33364.

AN1681: How to keep a Flyback Switch−Mode Power Supply Stable with a Critical−Mode Controller.

MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.)

Rating

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Power Supply Voltage (Operating)

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Line Voltage

Symbol

VCC

VLine

Value

Unit

16

V

700

V

Current Sense, Compensation,

Voltage Feedback, Restart Delay and Zero Current Input Voltage

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Zero Current Detect Input

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Restart Diode Current

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Power Dissipation and Thermal Characteristics

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ D1 and D2 Suffix, Plastic Package Case 751

Vin1

−1.0 to +10

V

Iin

±5.0

mA

Iin

5.0

mA

Maximum Power Dissipation @ TA = 70°C

Thermal Resistance, Junction−to−Air

PD

RqJA

450

mW

178

°C/W

D Suffix, Plastic Package Case 751B−05

Maximum Power Dissipation @ TA = 70°C

Thermal Resistance, Junction−to−Air

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Operating Junction Temperature

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Operating Ambient Temperature

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Storage Temperature Range

PD

RqJA

TJ

TA

Tstg

550

145

150

−25 to +125

−55 to +150

mW

°C/W

°C

°C

°C

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect

device reliability.

NOTE: ESD data available upon request.

http://onsemi.com

4

Share Link: